temperature-humidity index

[tem-per-uh-cher-hyoo-mid-i-tee in-deks, -yoo-, -pruh-, -per-cher-, -choor]

noun

Meteorology.

1. a number representing an estimate of the potentially debilitating effect of temperature and relative humidity on humans and animals, especially livestock: computed essentially as a combination of dry-bulb temperature and wet-bulb temperature but formulaically specific to a given species, as heat-stress tolerances vary significantly from one species to another. THI, T.H.I.

temperature-humidity index

noun

1. an index of the effect on human comfort of temperature and humidity levels, 65 being the highest comfortable level

Word History and Origins

Origin of temperature-humidity index¹

First recorded in 1955–60